Where did you attach the photos to? i can't see them.
Anyway i think your PSU is dying and it can't run three hash boards so when you discconected one of them the miner worked fine, a faully hash board does not really cause the kernel log to report power loss.
You can confirm this by swapping another hash board (the one you think is faulty) with one of the two running now.
pictures are in the quote, i will post here again
https://imgbb.com/bPGfKvs Q2 Measurement https://imgbb.com/vvf9QqD Q1 Measurement https://imgbb.com/YfnDM9K Q4 Measurements it is not the issue with PSU because power lost error message is coming only with One board I even disconnect other boards and connect only this board and error still appears, once I disconnect this specific board and reconnect the remaining two device is hashing normally
so I think this board is already dead and shorted somewhere ,